Thongchai Jaidee closed in on back-to-back victories on the Asian Tour after firing an eight-under-par third-round 64 to take a big lead at the Johnnie Walker Cambodian Open. The 39-year-old began the third round one shot behind compatriot Chawalit Plaphol, but took control of the $US 300,000 ($AU 455,985) tournament after firing six birdies on the front nine to go out in 30. He picked up further birdies on the 11th and 12th at Phookeethra Country Club to move to 18 under par (198), five strokes ahead of Americans Corey Harris (69) and Anthony Kang (69). “I played very well today. My irons and putts were very good. I&aposve been getting all my shots onto the fairways and greens with the exception of missing only one green on the 17th today,” said Thongchai, who edged Rhys Davies of Wales and Andrew Dodt of Australia in a play-off to win last week&aposs Hana Bank Vietnam Masters. “I don&apost want to think too much about the double now as I just want to continue doing what I&aposve been doing all week. I think if I putt well again, I can win the tournament.” Chawalit carded a level-par 72 to drop into a tie for fourth on 11 under with Singapore&aposs Lam Chih-bing (67) and England&aposs Steven Tiley (69). Davies recovered from a disappointing 75 in round two, shooting a five-under 67 to join Prom Meesawat of Thailand (67), Dutchman Guido van der Valk (68), Rory Hidayat of Indonesia (69) and Korea&aposs Park Jae-bum (71) in a tie for seventh on 10 under. Unho Park is the best of the Australian contingent on eight-under in a share of 15th spot.